JPH05165398A - Orchestral accompaniment device - Google Patents

Abstract

PURPOSE:To provide the orchestral accompaniment device which enables a correct song recorded on an orchestral accompaniment medium to be listened to when a user sings the song in a wrong way. CONSTITUTION:A 1st feature detecting means 105 detects the features of the song recorded on the orchestral accompaniment medium reproduced by a orchestral accompaniment medium reproducing device 101 and a 2nd feature detecting means 105 detects the features of the song inputted to a microphone 104. A comparing means 106 compares the output signals of the 1st and 2nd feature detecting means with each other and when the features of the song inputted to the microphone are greatly different from the features of the song recorded on the orchestral accompaniment medium, a 2nd amplitude control means 108 decreases the amplitude of the song inputted to the microphone according to the extent of the difference, so that the singing signal of the orchestral accompaniment reproducing device is outputted larger than usual.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a karaoke apparatus using a medium in which accompaniment and model singing are recorded.

[0002]

2. Description of the Related Art In recent years, karaoke devices have been equipped with various functions such as key control and addition of reverberation so that a user can easily sing a song. One of such functions is a voice switching function.

A conventional karaoke apparatus having a voice switching function is shown in FIG. The laser disk reproducing device 501 is
Reproduce the signal recorded on the laser disk. At present, many of the analog voices of laser discs commercially available for karaoke are of a voice multiplex system. On the audio multiplexing disc, only the "accompaniment" signal is recorded on the left channel, and the "accompaniment + song" signal is recorded on the right channel. The voice detection unit 503 rectifies the input signal from the microphone 502, and determines that the user is singing a song when the rectified value is a certain value or more. When the voice detection unit 503 determines that the user is singing a song, the signal switching unit 504 selects the signal from the microphone 502 and outputs it to the adder 505, and determines that the user is not singing a song. In this case, the “accompaniment + song” signal output from the laser disk reproducing device 501 is selected and sent to the adder 505. The adder 505 adds the accompaniment signal output from the laser disk reproducing device 501 and the output signal of the signal switching means 504, and outputs the result from the output terminal 506.

With such a structure, for example, the user forgets the lyrics and cannot sing, and the microphone 502 is used.
If the voice input is interrupted, the voice detection means 503 is switched, and the adder 505 adds the “accompaniment” signal and the “accompaniment + song” signal output from the laser disk reproducing device 501. Is output to the output terminal 506, and the song recorded on the laser disk is output to assist.

Further, the karaoke apparatus having such a voice switching function is also effective when practicing a duet song alone.

[0006]

In such a conventional configuration, since the voice detection means 503 switches the signals based on only whether or not the voice signal is input to the microphone 502, the pitch of the user's pitch. There is a problem that the user's voice is output as it is even if the rhythm is wrong.

It is an object of the present invention to provide a karaoke apparatus which allows a user to listen to a correct song recorded on a laser disc when the user sings the song incorrectly.

[0008]

A karaoke apparatus according to claim 1, wherein the karaoke media reproducing apparatus reproduces karaoke media, and first characteristic detecting means for extracting a characteristic from a singing signal output from the karaoke media reproducing apparatus. And a microphone for detecting a voice signal of the user, a second characteristic detecting means for extracting a characteristic from an output signal of the microphone, and a comparing means for comparing both output signals of the first and second characteristic detecting means. A first amplitude control means for controlling the output level of the song signal from the karaoke media reproducing device based on the comparison result output by the comparison means; and the microphone based on the comparison result output by the comparison means. Second amplitude control means for controlling the output level of the audio signal, the accompaniment signal output by the karaoke media reproducing apparatus, and the first and the first As input and respective output signals of the amplitude control means, characterized by comprising an adder for outputting a sum signal.

A karaoke device according to a second aspect of the invention is a karaoke media reproducing device for reproducing karaoke media, a singing signal separating means for extracting a singing signal from an output signal of the karaoke media reproducing device, and an output from the singing signal separating device. First feature detecting means for extracting a feature from the singing signal, a microphone for detecting a voice signal of the user, a second feature detecting means for extracting a feature from an output signal of the microphone, Comparing means for comparing both output signals of the second characteristic detecting means, and first amplitude controlling means for controlling the output level of the song signal from the karaoke media reproducing device based on the comparison result output by the comparing means. ,
Second amplitude control means for controlling the output level of the audio signal from the microphone based on the comparison result output by the comparison means, an accompaniment signal output by the karaoke media reproducing device, and the first and second amplitudes. It is characterized in that an adder which receives the respective output signals of the control means and outputs an addition signal is provided.

[0010]

According to the structure described in each claim, the characteristic of the song recorded in the karaoke medium is detected by the first characteristic detecting means, and the characteristic of the song input to the microphone is detected by the second characteristic detecting means. To detect. The output signals of the first and second characteristic detecting means are compared by the comparing means, and when the characteristic of the song input to the microphone is close to the characteristic of the song recorded in the karaoke medium, the first amplitude control means. By reducing the amplitude of the song recorded in the karaoke medium, a combined output of the accompaniment signal from the karaoke medium reproducing device and the singing voice of the user input to the microphone is generated at the output of the adder.

When the characteristics of the song input to the microphone are significantly different from the characteristics of the song recorded on the karaoke media, the amplitude of the song input to the microphone is adjusted by the second amplitude control means according to the degree. The output of the karaoke media playback device sounds louder than usual.

[0012]

Embodiments of the present invention will be described below with reference to FIGS. In FIG. 1, 101 is a laser disk reproducing device as a karaoke media reproducing device, 102 is a singing signal separating means for separating a singing signal from an output signal of the laser disk reproducing device 101, and 103 is a characteristic from an output signal of the singing signal separating means 102. First pitch detecting means as first characteristic detecting means, 104 is a microphone, 105 is second pitch detecting means as second characteristic detecting means for detecting a characteristic from an output signal of the microphone 104, 106 Is a comparing means for comparing the output signal of the first pitch detecting means 103 and the output signal of the second pitch detecting means 105, 107 is an input signal of the output signal of the singing signal separating means 102, and is the first of the comparing means 106. The first amplitude control means 108 controlled by the output signal inputs the output signal of the microphone 104, and the comparison means 1 Second amplitude control means controlled by the second output signal No. 6 and 109 inputs the accompaniment signal output from the laser disk reproducing apparatus 101 and the output signals of the first and second amplitude control means 107 and 108. It is an adder.

The laser disc reproducing device 101 reproduces a commercially available audio multiplex type laser disc for karaoke. The left channel of this laser disc has "accompaniment" and the right channel has "accompaniment + song". It is recorded. The singing signal separating means 102 extracts only the singing signal by subtracting the signal of the left channel from the signal of the right channel. The song signal extracted by the song signal separating means 102 is processed by the first pitch detecting means 103 to become pitch data. The specific configuration of the first pitch detecting means 103 will be described later.

On the other hand, the microphone 104 converts the user's song into an electric signal. The output signal of the micron 104 is also processed by the second pitch detecting means 105 and becomes pitch data.

The pitch data of the singing signal output from the first pitch detecting means 103 and the second pitch detecting means 10
The comparing means 106 compares the pitch data of the song input from the microphone 5 from the microphone. The comparison means 106 first subtracts the pitch data of the laser disk from the pitch data of the microphone 102. Since the result of this subtraction is instantaneous data, it is integrated by a leak integrator to create time-averaged data of the pitch difference. When the absolute value of the integrated pitch difference data is large, the pitch of the song input from the microphone 102 is out of the pitch of the song recorded on the laser disk. In this case, the output signal of the second amplitude control means 108 is the comparison means 106.
It is controlled to be small by the second output signal of. That is, the signal from the microphone 102 is narrowed down, and the signal from the laser disk is output greatly.

On the contrary, when the absolute value of the integrated pitch difference data is small, the pitch of the song input by the microphone does not deviate from the pitch of the song recorded on the laser disk. In this case, the output signal of the first amplitude control means 107 is controlled to be smaller by the first output signal of the comparison means 106. That is, the signal of the laser disk is narrowed down, and the signal input to the microphone is largely output. The state of this control is shown in FIG.

The accompaniment signal output from the laser disk reproducing apparatus 101, the singing signal of the laser disk whose amplitude is controlled by the first amplitude control means 107, and the second amplitude control means 1
09 is a microphone signal whose amplitude is controlled by the adder 1
09 is added and output from the output terminal 110.

Next, the structure of the first and second pitch detecting means 103, 105 will be described with reference to FIG. Reference numeral 301 is an acoustic signal input terminal, 302 is a binarizing means for binarizing an acoustic signal, 303 is a timing means controlled by the output of the binarizing means 302 and having an output latch (not shown), 304
Is a storage means for storing the time count value output from the time count means 303, and 305 is an output and storage means 304 for the time count means 303.
Comparing means for comparing the time count values read from each other and outputting a coincidence signal when the ratio of the two time count values is within a predetermined range, 3
Reference numeral 06 is an adding means with an output latch (not shown) for cumulatively adding the clock values read from the storage means 304, 307 is a clock signal generating means, and 308 is an output terminal. Figure 4
FIG. 4 is an operation waveform diagram of the block diagram shown in FIG. 3.

When the acoustic signal shown in FIG. 4 (a) is input to the acoustic signal input terminal 301, the output signal of the binarizing means 302 has the waveform shown in FIG. 4 (b). The clocking means 303 clocks with the clock signal supplied from the clock signal generating means 307, latches the clocked value T _n which is the clocking result at the rising edge of the waveform of the output signal of the binarizing means 302 in the output latch, and The result is reset and the timing of the next cycle is started. FIG. 4C shows the signal of the output latch of the clock means 303. The storage unit 304 stores the time count value T _n at the rising edge of the output signal of the binarization unit 302, and then sequentially reads the past time count values from the time count value T _n−1 as shown in FIG. This past time value T _n-1 , T _n-2 , ...
.. T _nm is sequentially compared with the time value T _n by the comparison means 305, and when the ratio of both time values is within a predetermined range, FIG.
The storage unit 30 outputs the coincidence signal shown in (e).
4 stops reading the measured value. Also, addition means 306
Is cumulatively added to the past measured values T _n-1 , T _n-2 , ... T _nm read out from the storage means 304 as shown in FIG. Latch in the latch. The output signal of the output latch of the adder 306 is shown in FIG.

The output Po of the output latch of the adding means 306 is
Clock signal that corresponds to the pitch of the acoustic signal
The relationship with ck is pitch period = Po / ck [Hz]
It To obtain the pitch period with high accuracy, the clock signal
It can be seen that the frequency of the signal should be increased. Also, FIG.
From (a), (b) and (c), the pitch period is T₀ + T
₁ , T₁ + T₂ , T₂ + T₃ Since it is ...
It is possible to prevent erroneous pitch extraction due to harmonics of the signal.
It The above is the first and second pitch detecting means 103, 105.
Is the explanation.

In the above-mentioned embodiment, the pitch detecting means has been described as an example of the feature extracting means, but the rhythm detecting means, the strength detecting means, etc. may be used as the feature extracting means, and the rhythm detecting means, the strength detecting means, etc. may be used.

The rhythm detecting means has a method in which an input signal is DC-detected and differentiated, and when the differentiated output exceeds a certain value, the time point is the rising edge of a note. In this case, the comparison means 106 detects the difference between the rising times of the notes of the song of the karaoke media and the song of the microphone input, and determines whether the difference is large or small as a criterion.

The strength detecting means has a method of detecting the input signal by direct current. The comparison means 106 detects the difference between the DC detection value of the song input by the microphone and the DC detection value of the song of the karaoke media, and determines whether the difference is large or small as a criterion.

In each of the above-mentioned embodiments, the first and second amplitude control means 107, 108 are adapted to narrow down the microphone input when the difference between the karaoke media song and the microphone input song is large. However, it is also possible for the user to increase the voice volume if his or her own voice is not output from the karaoke device. On the other hand, there is also a method in which the output level of the song of the user is kept constant and only the output level of the song of the karaoke media is adjusted. That is, when the difference between the song of the karaoke media and the song input by the microphone is large, the level of the song of the karaoke media is raised according to the difference, and when the difference is small, the level of the song of the karaoke media is narrowed down. Is the method.

In each of the above-described embodiments, the analog audio of the audio multiplex method of the laser disk has been described as an example, but various kinds of karaoke media are commercially available, and the digital audio of the laser disk and normal stereo recording are performed. Karaoke media such as compact discs, compact tapes, audio multiplex karaoke compact discs, and compact tapes can be used in the same manner.

In the digital sound of the laser disk, the accompaniment is recorded in stereo on the left channel and the right channel. When this digital audio signal can be used, the laser disk singing signal whose amplitude is controlled by the first amplitude control means 107 and the microphone signal whose amplitude is controlled by the second amplitude control means 109 are provided independently. The two adders are added to the left and right channels respectively.

There is also a karaoke apparatus in which a normal stereo-recorded compact disc or compact tape is used to cancel out the in-phase component of the left-channel and right-channel audio bands, and only the accompaniment sound can be taken out to make karaoke. In such a case, the singing signal separating means 10
2 can extract a singing signal by adding the components of the audio bands of the left channel and the right channel.

In the audio multiplex karaoke compact disc and compact tape, an accompaniment signal is recorded in the left channel and a singing signal is recorded in the right channel. When such a compact disc or compact tape of the audio multiplex karaoke system is used, the singing signal separating means as described in claim 1 is unnecessary.

[0029]

According to the structure described in each claim, when the characteristics of these two signals are very similar, the proportion of the singing signal recorded in the karaoke medium is reduced according to the degree of the characteristics. If they are not similar, the proportion of the singing signal recorded in the karaoke medium is increased according to the degree of the output.

Therefore, when the user sings the wrong way, the correct song recorded in the karaoke medium can be heard, so that the correct way of singing can be easily corrected. Is.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a karaoke device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing how the comparison means and the first and second amplitude control means are controlled in the same embodiment.

FIG. 3 is a specific configuration diagram of first and second feature detecting means in the embodiment.

FIG. 4 is a waveform diagram of each part of FIG.

FIG. 5 is a block diagram of a conventional karaoke device.

[Explanation of symbols]

101 Laser Disc Playback Device [Karaoke Media Playback Device] 102 Singing Signal Separation Means 103, 105 First and Second Pitch Detection Means [Feature Detection Means] 104 Microphone 106 Comparison Means 107, 108 First and Second Amplitude Control Means 109 adder 110 output terminal

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Koji Watanabe 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (7)

[Claims] 1. A karaoke media playing device for playing karaoke media, a first feature detecting means for extracting features from a singing signal output from the karaoke media playing device, and a microphone for detecting a voice signal of a user. Based on a second feature detecting means for extracting a feature from the output signal of the microphone, a comparing means for comparing both output signals of the first and second feature detecting means, and a comparison result output by the comparing means. First amplitude control means for controlling the output level of the song signal from the karaoke media reproducing device, and second amplitude control means for controlling the output level of the audio signal from the microphone based on the comparison result output by the comparing means. Control means, an accompaniment signal output by the karaoke media reproducing device, and output signals of the first and second amplitude control means, respectively. Then, a karaoke device provided with an adder that outputs an addition signal. 2. A karaoke media reproducing device for reproducing karaoke media, a singing signal separating means for extracting a singing signal from an output signal of the karaoke media reproducing device, and a singing signal outputted from the singing signal separating device. First feature detecting means for extracting, a microphone for detecting a voice signal of a user, second feature detecting means for extracting a feature from an output signal of the microphone, and the first and second
Comparing means for comparing both output signals of the feature detecting means, first amplitude control means for controlling the output level of the song signal from the karaoke media reproducing device based on the comparison result output by the comparing means, Second amplitude control means for controlling the output level of the audio signal from the microphone based on the comparison result output by the comparison means, the accompaniment signal output by the karaoke media reproducing device, and the first and second amplitude control. A karaoke device provided with an adder that receives each output signal of the means and outputs an addition signal. 3. The karaoke apparatus according to claim 1, wherein the first and second characteristic detecting means are pitch detecting means. 4. The karaoke apparatus according to claim 1, wherein the first and second characteristic detecting means are rhythm detecting means. 5. The karaoke apparatus according to claim 1, wherein the first and second characteristic detecting means are strength detecting means. 6. The comparing means controls, when the difference between the two input signals is large, to control the amplitude of the second amplitude control means to be small according to the difference, and when the difference between the two input signals is small. 3. The karaoke apparatus according to claim 1, wherein the first amplitude control means is controlled to reduce the amplitude in accordance with the difference. 7. The comparison means controls the amplitude of the first amplitude control means to be reduced in accordance with the difference when the difference between the two input signals is small. 2. The karaoke device described in 2.